Butt-hinge.



No. 691,077. Patented Ian. 14, I902. F. W. L. SGHAFER.

BUTT HINGE.

(Applicationfiled on a, 1900.)

(N o M o d e l UNITED STATES ATENT OFFICE.

BUTT-HINGE.

SPECIFICATION forming part of Letters Patent N 0. 691,077,

dated January 14, 1902.

Application filed October 3, 1900. Serial No. 31.899. (No model.)

To aZZ whom. it 71mg concern:

Be it known that I, FREDERICK W. L. SOHAFER, a citizen of the United States, residing at Los Banos, in the county of Merced, State of California, haveinvented certain new and useful Improvements in Butt-Hinges; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to hinges in general, and more particularly to the class of butthinges, the object of the invention being to provide a hinge which will permit opening of a door in either direction and which when the door is released in its open position will act to return the door to its normal position, further objects and advantages of the invention being evident from the following description.

In the drawings forming a port-ion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure 1 is an elevation showing a portion of a door and a jamb, the door and jamb being partly broken away to show the form and arrangement of the hinge. Fig. 2 is a view looking at the face of the jamb, with the door swung at an angle of ninety degrees. Fig. 3 is a view similar to Fig. 2 and showing the door swung in an opposite direction. Fig. 4 is a side elevation of the central cam-sleeve. Fig. 5 is aperspective view of one of the leaves of the hinge.

Referring now to the drawings, the hinge comprises two leaves 5 and 6, each of which has a bearing-sleeve 7 and 8, respectively, which receive the pintle 9 of the hinge. The leaves project diametrically from the bearingsleeves, as shown, whereby the leaves may in practice be inserted in slots in the edge of the door to he hinged and in the face of the jamb,

the hinge permitting the door to be swung in either direction.

The mutually adjacent ends of the sleeves 7 and 8 are cut or molded to form spirally-disposed inclined planes 10 and 11, which rap helically around the pintle, so that the upper end of the inclined plane of each sleeve lies vertically above the lower end, the two hingeleaves, with their sleeves, being thus exact duplicates in reversed positions.

A third bearing-sleeve 15 is disposed rotatably upon the pintle 9, the ends of the sleeve 15 being formed by inclined planes 16 and 17, disposed helically of the pintle, the inclined surfaces of the several sleeves being, in effect, continuous converging cams and the camfaces at the ends of the sleeves 7 and 8 being adapted to rest upon the cam-faces at the ends of the sleeve 15. The result of this construction is that if the door he moved in one direction, as shown in Fig. 2, the longitudinallyextending walls 18 and 19 at the adjacent ends of sleeves 7 and 15 will engage, causing sleeve 15 to turn and its lowerend to ride up the {incline of the cam at the upper end of sleeve 8. When the door is released, the weight of the door will cause the cam-face of sleeve 15 to run down the face of sleeve 8, with the result that the door will be closed. Conversely, if the door he turned in the opposite direction, as shown in Fig. 3 of the drawings, the straight walls 20 and 21 of sleeves l5 and 8 will engage, so that sleeve 15 will be held stationary and the cam-faces at the adjacent ends of sleeves 7 and 15 will ride one upon the other, so that the upper sleeve, and therewith the door, will be raised. Then the door is released, it will close by reason of the camfaces working in the opposite direction.

It will of course be understood that in practice the hinge-leaves may be attached in any desired manner and that other modifications may be made, also that any suitable materials and proportions may be used for the various parts, without departing from the spirit of the invention.

What is claimed is- A hinge comprising separate leaves each havingasleeve,apintle connecting the sleeves to permit of rotation of the sleeves with respect to each other, the adjacent ends of the sleeves being continuously beveled to form converging helical cams and longitudinallyextending shoulders, and a separate sleeve mounted loosely upon the pintle between the first-named sleeves and having its ends continuously beveled to form converging helical name,

cams corresponding to the adjacent cams of nesses, on this 16th day of July,

the first sleeves and longitudinally-extending shoulders, whereby the upper leaf will be 5 raised when swung in either direction from the plane of the lower leaf. 1

In testimony whereof I hereunto sign my in the presence of two subscribing wit- FREDERICK W. L. SCHAFER.

Witnesses:

J. N. SEARS, MARSHALL .MARTIN. 

